题目

Have you ever been afraid to talk back when you were treated unfairly? Have you ever bought something just because the salesman talked you into it? Are you afraid to ask a boy (girl) for a date？ Many people are afraid to assert themselves (insist upon their own rights). Dr Robert Alberti, author of Stand Up, Speak Out, and Talk Back, thinks it’s because their self-esteem(自尊) is low. “Our whole set-up makes people doubt themselves,” says Alberti. “There’s always a 'superior' around — a parent, a teacher, a boss — who 'knows better’”. But Alberti and other scientists are下列属于后天学习行为的是（　　）A．蜜蜂跳舞B．蜘蛛结网C．母鸡孵卵D．小狗算加法